Make strategy switch console Worker-only

[Pigbibi]

Summary

• move the strategy switch UI source from docs/index.html into the Worker package
• remove the GitHub Pages/static switch page docs and entry files
• add per-account default strategy metadata so SOXL and Smart DCA accounts no longer appear as TQQQ by default
• allow the Worker account config to preserve default_strategy_profile

Tests

• python3 scripts/sync_strategy_switch_page_asset.py
• sed -n '/<script>/,/</script>/p' web/strategy-switch-console/index.html | sed '1d;$d' | node --check --input-type=commonjs
• node --check --input-type=module < web/strategy-switch-console/page_asset.js
• node --check --input-type=module < web/strategy-switch-console/worker.js
• git diff --check
• python3 scripts/runtime_settings.py validate
• python3 -m unittest discover -s tests -v